Circuit Diagram

PRECISION_PHASE_SPLITTER

Published:2009/7/10 2:33:00 Author:May

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500000_PPS_SCALER

Published:2009/7/19 22:09:00 Author:Jessie

Uses seven fast gasfilled decade counter tubes driven by transistors, for counting pulses from nuclear radiation detector. Input channel, which can accept positive or negative pulses from 0.1 to100 v, has amplitude discriminator and coincidence-anticoincidence gating.-M. Birk, H. Brafman, and J. Sokolowski, Transistors Drive Half-Megacycle Cold-Cathode scaler, Electronics, 34:41, p 60-61.   (View)

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SIMPLE_ABSOLUTE_VALUE_CIRCUIT

Published:2009/7/10 2:33:00 Author:May

When an input voltage is positive, the output of ICA is negative and diode D does not conduct; hence the output of ICB is positive. On the other hand, when the input is negative, the output of ICA is positive.D will conduct and cause the absolute value, expressed as a positive voltage, to appear on the noninverting input of ICB and on the circuit's output. The circuit'sdynamic range extends from zero to the point at which the op amp saturates. The band-width is determined by the characteristics of the diode and the high-frequency performance of the op amp.   (View)

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MALFUNCTION_MONITOR

Published:2009/7/19 22:09:00 Author:Jessie

Used for monitoring missile in light while maintaining radio silence of telemetry transmitter unless abnormal condition is detected. After arming of missile, monitor can be used to transmit missile kill data.-R. C. Wright, Collecting Data from Live Missiles in Flight, Electronics, 34:12, p 46-49.   (View)

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WIDEBAND_SIGNAL_SPLITTER

Published:2009/7/10 2:33:00 Author:May

With one HA-2539 or HA-2540 and two low-capacitance switching diodes, signals exceeding 10 MHz can be separated. This circuit is most useful for full-wave rectification, AM detection, or sync generation.   (View)

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SIMPLE_DIODE_CURVE_TRACER

Published:2009/7/10 2:31:00 Author:May

Suitable for matching diodes or examining V/I characteristics of two terminal devices (diodes, etc.), this circuit should be handy for lab use. R1 and R2 can be increased in value and a higher voltage transformer can be used for higher voltage test using this principle.   (View)

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VOICE_OPERATED_SWITCH

Published:2009/7/10 2:31:00 Author:May

The sound picked up by SPKR1, which acts as a microphone, is fed to transistor amplifier Q1. The output of Q1 is applied across coupling transformer T1 and is used to drive the gate circuit of Triac TR1. TR1 is used to lend a latching effect to the action of the relay.   (View)

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Microprocessor_controlled_TTY_to_A_D_convener_interface

Published:2009/7/19 22:09:00 Author:Jessie

Microprocessor-controlled TTY-to-A/D convener interface. The AD7570 is a 10-bit CMOS A/D convener (courtesy Analog Devices, Inc.).   (View)

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PREFERRED_PARALLEL_TRIGGERED_BLOCKING_OSCILLATOR_BELOW_2000_PPS

Published:2009/7/19 22:09:00 Author:Jessie

Produces synchronizing impulses between 0.2 and 7 microsec wide at rates of 200 to 2,000 pps. One triode section is used as trigger amplifier to prevent triode blocking oscillator from reacting on trigger source. R6 and R7 are 100 ohms for 5814A and 150 ohms for 6111. R8 should be maximum that will just suppress ringing. Requires positive input trigger and gives choice of output polarities at the four output terminals.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol. I, Electron Tube Circuits, 1963, PC 46, p 46-2.   (View)

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OCTAVE_SHIFTER_FOR_MUSICAL_EFFECTS

Published:2009/7/10 2:31:00 Author:May

This musical special-effect device is basically a frequency doubler. The input audio is amplified and doubled by using a full-wave rectifier, which has a dc output plus a twice the ac frequency component. The 2 x frequency component is fed to the output.   (View)

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Single_setpoint_temperature_controller

Published:2009/7/19 22:09:00 Author:Jessie

In this circuit, the AD590 produces a temperature-dependent voltage across R (C is for filtering noise). Setting R2 produces a scale-zero voltage. For the Celsius scale, make R=1 kΩ and VZERO=0.273 V. For the Fahrenheit scale, R=1.8kΩand VZERO=0.460V. Harris Semiconductors. Data Acquisition 1991 p 12-8   (View)

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SOUNG_ACTIVATED_SWITCH

Published:2009/7/10 2:30:00 Author:May

A1 and A2 are two sections of a quad comparator. The first, A1, functions as an amplifier and detector. Resistors R5 and R6 set the gain at 100; the output of A1 is an open collector to negative-peak-rectify the output with a decay time constant determined by R9 and C3. This dc output is then compared with the reference level selected by R8. A2 triggers switch Q1, and an LED inserted in the base drive of Q1 gives visual indication of switch closure. The standby battery drain is 2 mA. Use potentiometer R8 to select the desired sensitivity.   (View)

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ANEMOVANE_AUDIO_OSCILLATOR

Published:2009/7/19 22:07:00 Author:Jessie

Used for telemetering wind velocity. Cam switch closes for each mile of wind that passes the anemometer cups, applying voltage to C1 and C2 in series and making Q1 conduct and pull in K1. This energizes velocity audio oscillator of telemetry system.-R. Beaulieu and G. Neal, Wind Velocity Telemetering System, Electronics, 33:29, p 68-70.   (View)

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O_20V_HIGH_PRECISION

Published:2009/7/19 22:07:00 Author:Jessie

National LM199 temperature-stabilized 6.95-V reference feeds LM108A opamp that is buffered by LM195K power transistor IC which provides full overload protection.- Li near Applications, Val. 2, National Semiconductor, Santa Clara, AN-161,p6.   (View)

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VOLTAGE_CONTROLLED_CRYSTAL_OSCILLATOR

Published:2009/7/10 2:30:00 Author:May

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60_MC_COMMON_BASE_1_

Published:2009/7/19 22:07:00 Author:Jessie

Delivers 10 mw to 50-ohm load at 25℃. Collector efficiency is 10%.-Texas Instruments Inc., Solid-State Communications, McGraw-Hill, N.Y., 1966 p 239.   (View)

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STABLE_SUPERREGENERATIVE

Published:2009/7/10 2:30:00 Author:May

Agc circuit transforms grid-pulsed superregenerative am pliler V1 into noncritical circuit that is stable for long periods when controlled by pulse generator V4-V5, which in tum is controlled by extemal trigger pulse source.-J. H. Kuck, Automatk Gain Control for Superregenerative Amplifiers, Electronics, 34:29, p 76-79.   (View)

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VOR_SIGNAL_SIMULATOR

Published:2009/7/10 2:29:00 Author:May

An output of 9960 and 30 Hz at 0.5 Vrms is produced by this VOR (VHF Omni Range) signal simula-tor, which uses a pair of 555 timers. Alternatively, a 556 (two timers in one package) could be used.   (View)

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NEUTRON_COUNTING_TRANSMITTER

Published:2009/7/19 22:07:00 Author:Jessie

Used with cosmic-ray neutron counter to drive con ventional radiosonde. Signals above preset amplitude trigger subcarrier gate that in turn frequency-modulates r-f carrier.-L. Hillman and R. C. Haymes, Modifying a Telemetry System for Balloon-Borne Neutron Detection, Electronics, 34:11, p 60-63.   (View)

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100_MHz_OVERTONE_OSCILLATOR

Published:2009/7/10 2:28:00 Author:May

This oscillator circuit uses a 5th overtone crystal in the 85-to-106 MHz range. Y1 ii the crystal. The circuit was originally used to frequency control a microwave oscillator.   (View)

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